Spadellidae is a

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

of sagittoideans in the

order Order, ORDER or Orders may refer to: * A socio-political or established or existing order, e.g. World order, Ancien Regime, Pax Britannica * Categorization, the process in which ideas and objects are recognized, differentiated, and understood ...

Phragmophora. Spadellidae prey on

plankton Plankton are the diverse collection of organisms that drift in Hydrosphere, water (or atmosphere, air) but are unable to actively propel themselves against ocean current, currents (or wind). The individual organisms constituting plankton are ca ...

and commonly reside in the epipelagic zone of the ocean.

Genera

*'' Bathyspadella'' Tokioka, 1939Tokioka, T. (1939). Three new chaetognaths from Japanese waters. ''Memoirs of the Imperial Marine Observatory'', 7, 129–139. *'' Calispadella'' Casanova & Moreau, 2005Casanova, J. Moreau, X. (2005). ''Calispadella alata'' n. gen., n. sp., the first chaetognath recorded from a

hydrothermal vent Hydrothermal vents are fissures on the seabed from which geothermally heated water discharges. They are commonly found near volcanically active places, areas where tectonic plates are moving apart at mid-ocean ridges, ocean basins, and hot ...

site (Mid-Atlantic Ridge). ''Journal of Plankton Research'', 27(2), 221–225. *'' Hemispadella'' Casanova, 1996Casanova, J. (1996). A new genus and species of deep benthic chaetognath from the Atlantic: a probable link between the families Heterokrohniidae and Spadellidae. ''Journal of Natural History'', 30, 1239–1245. *'' Paraspadella'' von Salvini-Plawen, 1986von Salvini-Plawen, L. (1986). Systematic notes on ''Spadella'' and on the Chaetognatha in general. ''Zeitschrift für Zoologische Systematik und Evolutionsforschung'', 24(2), 122–128. *'' Spadella'' Langerhans, 1880Langerhans, P. (1880). Die Wurmfauna Madeiras. ''Zeitschrift für Wissenschaftliche Zoologie'', 33, 271–316.

References

Chaetognatha Protostome families {{Chaetognatha-stub